fiber optic 16

Question 1

A method used to lock and mark one end of a line in order to allow someone to safely work on the other end.

Answer 1

Lockout tag-out

Question 2

A card made up of material similar to photographic film that changes colors when exposed to light.

Answer 2

Photosensitive card

Question 3

Visible light is generated at the following wavelengths

Answer 3

Between 390 nm and 780 nm

Question 4

Allows only a single mode of light to propagate through the fiber core. This is the most common type of fiber used in telecommunications.

Answer 4

single-mode fiber

Question 5

Allows many modes of light to propagate through the core. This type of fiber has a larger core and is used only for short distance data links. The bandwidth is limited due to light dispersion.

Answer 5

multi-mode fiber

Question 6

The center of the fiber that carries the transmitted light.

Answer 6

core

Question 7

The glass material surrounding the fiber core. This glass has a lower refractive index and reflects the light back into the core, thus maintaining the light level over a long distance.

Answer 7

cladding

Question 8

The acrylic or plastic material applied over the optical fiber core and cladding. This material protects the glass and adds to its strength.

Answer 8

coating

Question 9

The ratio of the velocity of light of two mediums of optical glass.

Answer 9

refractive index

Question 10

A photo diode used to detect light from an optical fiber and convert the light to an electrical source.

Answer 10

pin diode

Question 11

The difference between transmitted and received power resulting from the loss through equipment, lines, or other transmission devices; usually expressed in decibels.

Answer 11

attenuation

Question 12

EDFA

Answer 12

erbium-doped fiber amplifier

Question 13

YEDFA

Answer 13

Ytterbium Erbium-doped fiber amplifier

Question 14

Fiber Loss at 1310nm

Answer 14

.35 dB/km

Question 15

Fiber Loss at 1550nm

Answer 15

.25 dB/km

Question 16

How many feet in a Kilometer

Answer 16

3,280 ft

Question 17

Sum of all the losses associated with a fiber link between the optical fiber transmitter and the optical fiber receiver.

Answer 17

loss budget

Question 18

Fusion Splice loss (typical)

Answer 18

0.1 dB

Question 19

Mechanical Splice loss (typical)

Answer 19

0.25 dB

Question 20

Connector Loss

Answer 20

0.5 dB average

Question 21

Convert mW to dBm

Answer 21

dBm = 10log(mW)

Question 22

Convert dBm to mW

Answer 22

mW = 10(dB/10)

Question 23

A jumper cable for optical connections.

Answer 23

pigtail

Question 24

A board for making optical connections consisting of sleeves used to line up two connectors.

Answer 24

patch panel

Question 25

Fibers are contained in a plastic tube much larger than the optical fibers. The fibers can move freely within the

Answer 25

loose tube

Question 26

Color-coded tubes that house and protect the optical fibers within a fiber optic cable.

Answer 26

buffer tube

Question 27

consists of larger buffer tubes with the fibers inside, surrounded by fiberglass water block tape, armor, two steel strength members, and a jacket.

Answer 27

Unitube

Question 28

fibers that are arranged side by side

Answer 28

Ribbon

Question 29

the process by which two pieces of glass are physically melted together

Answer 29

Fusion splicing

Question 30

inserting two pieces of glass into a plastic locking sleeve, carefully aligning the fibers, and locking the pieces of fiber together

Answer 30

Mechanical splicing

Question 31

Clean all gel from the buffer tubes and individual fibers with

Answer 31

isopropyl alcohol that is at least 90% pure.

Question 32

how far back should you strip the fiber

Answer 32

1-1/2 to 2 inches

Question 33

two ways how splice machine lines up the fiber ends in order to get the best possible splice

Answer 33

Local Injection and Detection (LID), and Profile Alignment

Question 34

A device used to wrap and store excess fiber optic cable in an aerial location.

Answer 34

snowshoe

Question 35

Comcast currently allows for____of loss through a fusion splice

Answer 35

.05 dB

Question 36

OTDR

Answer 36

Optical Time Domain Reflectometer

Question 37

Fiber connector used like a snap connector, but a twist lock feature much like a BNC RF connector.

Answer 37

ferruled connector

Question 38

A rectangular plastic form used to connect optical fiber to optical devices.

Answer 38

snap connector

Question 39

Fiber connector that uses an 8 to 12 degree angled cut end.

Answer 39

APC (Angle Polish Connector)

Question 40

A special optical fiber connector used in gigabit Ethernet devices.

Answer 40

LCSC

Question 41

LASER acronym

Answer 41

Light Amplification Stimulated by Emission of Radiation

Question 42

An electronic or optical process that combines several individual signals or wavelengths into a single carrier or path.

Answer 42

multiplexing

Question 43

Enables different wavelengths to be carried on a single optical fiber.

Answer 43

wavelength division multiplexing

Question 44

Allows multiple wavelengths above and below a center wavelength to be carried on a single optical fiber.

Answer 44

DWDM (dense wave division multiplexing

Question 45

A connection point in a cable system where a fiber enters a neighborhood and the optical signal is converted to an electrical signal

Answer 45

node

Question 46

Used to detect light from an optical fiber and convert the light to an electrical source.

Answer 46

photodiode

Question 47

Optical fiber with erbium, a rare earth material, added to the glass during the manufacturing process, to give the fiber useful properties when properly lased

Answer 47

doping

Question 48

Used to amplify light (1550 nm). It does so by utilizing an Erbium (rare earth metal) doped fiber and a pump laser. This enables the light to travel greater distances.

Answer 48

EDFA (erbium-doped fiber amplifier)

Question 49

provides an even greater gain in light than an EDFA Optical Amplifier.

Answer 49

YEDFA (ytterbium erbium-doped fiber amplifier)

Question 50

Central data point communicating with endpoints of a network. All data communications must flow through the central point.

Answer 50

STAR

Question 51

A network of devices connected together in a circular communication link.

Answer 51

ring

Question 52

Generated during the node certification showing the fiber performance when first activated. It is a document used to compare old test results to new test results.

Answer 52

node birth certificate

Question 53

The distance that cannot be seen by the OTDR because it too close to the OTDR source.

Answer 53

dead zone

Question 54

Extra fiber connected to the OTDR (approximately 500 to 1,000 meters) to make up for the dead zone

Answer 54

launch cable

Question 55

Device used to test the optical power. It converts the amount of light present to a dBm level.

Answer 55

optical power meter

Question 56

Fiber optic measurement based on the equivalent heating power of the light. It is measured in dBm.

Answer 56

optical power

Question 57

Silicon photodiodes are sensitive to light in the range of

Answer 57

400 to 1000 nm.

Question 58

Most fiber optic power meters are available with a choice of three detectors

Answer 58

Silicon (Si), Germanium (Ge) ,Indium-Gallium-Arsenide (InGaAs).

Question 59

A cabinet or rack that houses the splices of the outside plant fiber to the inside headend, node, or OTN fiber.

Answer 59

splice panel

Question 60

(OCEF)

Answer 60

Optical Cable Entry Facility